Diamond



FIG. 1 is a top perspective view of a diamond showing our new design;

FIG. 2 is a bottom plan view;

FIG. 3 is a front elevational view, the rear elevational view being identical; and,

FIG. 4 is a right side plan view, the left side plan view being Identical.

The portions of the diamond shown in broken lines in the Figures are for environmental purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a diamond, shown and described in the drawings. 